Java - 如何将由空格分隔的整数读入数组 [英] Java - How to read integers separated by a space into an array

问题描述

我的项目遇到问题，因为我无法得到正确的结论，即读取由用户空格分隔的整数行并将值放入数组中。

I am having trouble with my project because I can't get the beginning correct, which is to read a line of integers separated by a space from the user and place the values into an array.

    System.out.println("Enter the elements separated by spaces: ");
    String input = sc.next();
    StringTokenizer strToken = new StringTokenizer(input);
    int count = strToken.countTokens();
    //Reads in the numbers to the array
    System.out.println("Count: " + count);
    int[] arr = new int[count];

    for(int x = 0;x < count;x++){
        arr[x] = Integer.parseInt((String)strToken.nextElement());
    }

这就是我所拥有的，它似乎只是读取了第一个元素数组，因为当初始化count时，由于某种原因它被设置为1.

This is what I have, and it only seems to read the first element in the array because when count is initialized, it is set to 1 for some reason.

任何人都可以帮助我吗？以不同的方式做这件事会更好吗？

Can anyone help me? Would it be better to do this a different way?

推荐答案

只需要做一些微小的改动就可以使你的代码工作。 错误在此行中：

There is only a tiny change necessary to make your code work. The error is in this line:

String input = sc.next();

正如我在问题评论中指出的那样，它只读取下一个输入标记。请参阅文档。

As pointed out in my comment under the question, it only reads the next token of input. See the documentation.

如果用

String input = sc.nextLine();

它会做你想做的事，因为 nextLine（） 消耗整行输入。

it will do what you want it to do, because nextLine() consumes the whole line of input.

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